Talk Morgan Forums Morgan Sports Cars Morgan Three Wheeler & Super 3 Noisy compensator

My guess is that you may not get or maintain sufficient alignment to get a perfectly balanced assembly.

The transient torque loadings are the problem with the S&S engine. It seems that they are truly massive and even Centa were surprised by how difficult it was to smooth things out enough.

From memory the absolute torque loadings peak at around 1150 lb/ft. Quite scary!

1150?! How can that be?

Extremely short spikes of torque. The normally quoted torque figure can be thought of as an average over a couple of revolutions of the crank. The inertia of the mass of the crank will help smooth things out compared to a lightweight crank but the S&S needs more help than most.

Oi.........I like my sausage sandwiches Mike!

I was a tad out on the torque......a quote from Andrew English article in the Telegraph.

"At the heart of the Three Wheeler is its V-twin engine from S&S of Wisconsin, USA. Known as the X-Wedge and introduced in 2007, this 1,982cc, dry-sump unit has a 56.25-degree angle, a solid, forged 43lb crank for longevity and engine balance at idle and three belt-driven camshafts to allow almost straight pushrods. Retailing at approximately £6,700 in the States, this two-valve, fuel-injected unit punches out 115bhp and 100lb ft of torque with peak revs at 5,200rpm. It’s like a Harley unit but better: S&S has been in the engine business since 1956 and is highly respected.
The trouble is, torque kills transmissions. S&S says it produces torque spikes of 1,800lb ft, which makes the gears clash and sing against each other. Reeves and his team, together with S&S, have adapted a Harley-Davidson mechanical cushion drive, which successfully irons out the firing impulses. The engine sits on a rubber-mounted bed plate and the stainless steel exhausts have flexible couplings and mountings. Start her up and you see a lot of movement, but the cabin and major controls are stock still."

I'm still waiting for the dealer to get back to me on whether or not a grease nipple can be fited. That's been a week with no answer from Morgan.

Tim

Blimey. If that is so, no wonder the word 'humungous' was invented.

In the words of Monty Python - a week, you were lucky!

I'm at 2 months and counting......

Sounds like a question for Mark. Have you tried the help line Mike?